Simrad PSIMTM datagram format
Simrad PSIMTM is a proprietary datagram format created by Kongsberg Discovery to provide the temperature of the water. It also provides the horizontal distance and the slant range between the vessel and the sensor, as well as the true bearing. These values are used together with the GPS position of the vessel to calculate the position of the sensor.
Format
$PSIMTM,xx,M,yy,M,z.z,T,g.g,M,a,hhmmss*hh<CR><LF>
Description
1 $PSIMTMTalker identifier
2 xx,MSlant Range to sensor (metres)
3 yy,MHorizontal range to sensor (metres)
4 z.z,TTrue Bearing (metres)
5 g.g,M: Water temperature (-5 to 30 degrees Celcius)
6 aTime of transmission
7 hhmmssTime of transmission
8 *hhChecksum